Fascinating graph shows the estimated total mass of all the mammals living on Earth.
In 1850, it was evenly divided between wildlife and humans + domesticated animals. Today, humans and their livestock account for about 95% of the total.
https://www.nature.com/articles/s41467-025-63888-z #science #nature #animals
Good point. I wasn't thinking about pets. I wonder what fraction they are -- probably small but not negligible.
Hold on, the answer is in the paper!
For all house pets & human-associated rodents, "Their combined biomass increased from an estimated ≈5 Mt in 1850 to ≈20 Mt in 2020". So about 2 percent of the total human/domesticated biomass, including rats and mice.
Corey S Powell
Jorge Candeias